Pope Leo undergoes surgery after lung cancer diagnosis

Pope Leo underwent surgery Tuesday at Rome's Gemelli hospital to remove the lower lobe of his right lung after doctors discovered lung adenocarcinoma during a routine health examination. The 71-year-old pontiff, who leads the world's 1.4 billion Catholics, was admitted for the procedure and emerged from the operating room without complications. His surgical team—led by Dr. Stefano Margaritora and supported by his personal physician Dr. Luigi Carbone—completed the video-assisted operation in approximately 90 minutes, with the explicit goal of eliminating all cancerous tissue.

Lung adenocarcinoma is a common form of lung cancer. Tissue samples taken during surgery confirmed what preparatory examinations had suggested. The Vatican released a medical bulletin confirming the diagnosis and the successful removal of the lower lobe from Leo's right lung—one of three lobes on that side. Leo regained consciousness normally after anesthesia and returned to his hospital room to rest. The Vatican announced he would remain hospitalized for roughly a week, with all public engagements cancelled through October 20.

The pontiff's arrival at the hospital that morning drew crowds. He left the Vatican shortly before 1 p.m. in a black SUV, waving from the vehicle as his convoy traveled the nine kilometers north to Gemelli. Upon arrival, he shook hands with officials, walked past gathered well-wishers who called out "Auguri"—best wishes in Italian—and entered through the main entrance on his own feet.

Leo, born Robert Prevost in Chicago in 1955, was elected pope in May 2025 following the death of Pope Francis in April. He is relatively young for a Church leader and maintains an active lifestyle that includes tennis. He is not known to be a smoker and had no reported recent health problems before this diagnosis. On Monday, the day before surgery, he spoke publicly in a firm, clear voice at his only scheduled event.

Yet critical questions about his prognosis remain unanswered. Dr. Stephen Liu, a lung cancer specialist at Georgetown University, noted that the Vatican has not disclosed the tumor's size or whether cancer has spread to lymph nodes—information essential to determining the cancer's stage and predicting long-term outcomes. "If this is a small lung cancer with no lymph nodes involved, surgery itself is likely to be curative," Liu told Reuters. "But if final analysis reveals a greater extent of cancer involvement, this indicates a poorer prognosis." The distinction between these scenarios will shape not only Leo's personal recovery but also the Church's operational capacity in the months ahead.

The timing carries institutional weight. Leo maintains an extraordinarily demanding schedule and has no deputy to assume duties when he is incapacitated. The Vatican's vast bureaucracy continues its work during a pope's illness, but decisions requiring papal approval are held in abeyance. Leo had been scheduled to undertake an 11-day tour of Uruguay, Argentina, and Peru beginning November 6, but the status of that trip remains uncertain pending his recovery. His history includes a bout with typhoid fever in 1985 when he was a young priest serving as a missionary in Peru—an episode that required hospitalization but from which he recovered fully.